RF Filters and Signal Conditioning

RF Filters

PPM Systems offers bespoke filter and RF conditioning solutions for satellite communication (satcom), military and other sectors using a range of filtering technologies and custom application, including a wide range of Corry Micronics off the shelf filter products. We can provide individual filters or a complete solution–system integration, as well as filter design, test, evaluation and manufacture.

Systems can include Lumped Element (LC), resonant cavity RF filters and suspended substrate stripline filters. Our RF filters and antenna technology can also be fully integrated into a custom antenna assembly if required.

We recognise the frequent need to support tight timescales and offer a highly responsive service – from fast prototyping, to advice on choosing the best technology. We also have extensive experience in supporting applications requiring high levels of data security and security clearance.

Understanding Different Types of Filter

Click here for more resources and guides to RF filtering products.

Filter Enquiry

Custom RF Filters

PPM Systems can provide the following types of custom filters:

Lowpass & highpass filters
Bandpass filters
Bandstop filters
Diplexers
Switched bank filters.

Understanding Different Types of Filter

Plastic Filters

PPM Systems can offer a range of plastic housing, metal plated cavity RF Filters, specially designed to save weight over traditional filters. These innovative filters are extremely useful for lightweight applications giving approximately a 50% weight saving compared to aluminium, while maintaining similar electrical characteristics.

The range of Plastic RF Filters includes:

Band Pass Filters
Diplexers
Cavity Power Combiners
Notch Filters.

Composite Microwave Filters

Understanding Different Types of Filter

Part Number*	Center Frequency (MHz)	Bandwidth (MHZ) Fc +/-	Bandwidth (MHZ)	Insertion Loss (dB) MAX	Power Rating (W)	VSWR (MAX)
CMIBPF-2450	2450	45	90	0.8	20
CMIBPF-915-30MP	915	13	26	0.8	20	1.4
CMIBPF-2437-75MP	2475	75	150	0.5	20	1.4
CMIBPF-925-50B	925	35	70	1.5	200	1.3
CMIBNF-1.2-1.65-45-P Notch	1.225	22.5	45	45	75

*Click the product name to view the datasheet

Cavity Filters

Cavities filters are designed with a number of tuned cavities coupled together. They are capable of high power applications with low insertion loss and high rejection. Ideal for notch filter applications, they can be combined into diplexers and power combiners.

Understanding Different Types of Filter

Cavity Filters

Part Number*	Center Frequency (MHz)	Bandwidth (MHz) Fc +/-	Bandwidth (MHz)	Insertion Loss (dB) MAX	Power Rating (W)	VSWR (MAX)
CLB-BPF-41TXRX	27.5	2.6	5.2	1.8	10	2
CMIBPF-47.2-51.4G	49.3	4200	8400	2	10	1.5
CMIBF-165X15-1	165	7.5	15	1	180	1.5
CMIBF-172.3X4-1	172.3	2	4	0.8	180	1.5
CMIBF-220X4-1	220	2	4	1	180	1.5
CMIBPF-335	335	15	30	0.5	2	1.5
CMIBF-390X20-1	390	10	20	1	50	1.4
CMIBF-433-1	433	5	10	2	10	1.5
CMIBF-445X5-1	445	2.5	5	0.8	20	1.5
CLB-BPF-1217RX	707	9	18	2.0	10	1.5
CLB-BPF-13RX	782	5	10	3.0	10	1.5
CMIF221-CDMA-05	830	5	10	2.0	50	1.22
CLB-BPF-26RX	831.5	17.5	35	2.0	10	1.5
CMIBF-GSM800-1	847	15	30	2	10	1.43
CMIF221-CDMA-06	890	5	10	2.0	50	1.22
CMIBF-GSM900-1	897.5	17.5	35	2	10	1.43
CMIBPF-925-50B	925	35	70	1.5	200	1.3
CMIBF-G35-1	942.5	17.5	35	2	5	1.29
CMIBF-1030X10-1	1030	5	10	2.5	10	1.3
CMIBF-1090X10-1	1090	5	10	2.5	10	1.3
CMIBF-1290X8-1	1290	4	8	0.8	20	1.5
CMIBPF-1438	1437.9	17	34	1.3	10	1.3
CMIBF-1450X500-J1	1450	250	500	3	2	1.5
CMIBPF-1455	1455.4	7.5	15	1.0	10	1.3
CMIBF-1457X20-1	1457	10	20	1.6	10	1.3
CMIBPF-1680-110W	1680	80	160	1.0	110	1.4
CMIBF-DCS1800-1	1747.5	37.5	75	1.5	10	1.43
CMIBF-1795X20-1	1795	10	20	1.6	10	1.3
CLB-BPF-25RX	1882.5	15	30	1.5	10	1.5
CMIBPF-1882	1882.5	32.5	65	1.0	10	1.3
CMIBF-UMTS2100-1	1950	30	60	0.6	10	1.43
CMIBF-WCDMA-1	1950	30	60	1	100	1.29
CMIF221-WCDMA-01	1950	30	60	1.0	100	1.29
CMIBF-WCDMA-F1	2045	125	250	1.6	200	1.3
CMIF221-WCDMA-0	2140	30	60	1.0	100	1.29
CMIF221-TDSCDMA-04	2175	7.5	15	1.2	10	1.22
CMIBF-2282X80-1	2282	40	80	0.5	150	1.5
CMIBF-2300X230-2	2300	115	230	1.2	20	1.3
CMIBPF-2450	2450	45	90	0.8	20	1.22
CMIBF-2475X50-1	2475	250	500	1	5	1.3
CMIBF-LTE2600-1	2535	17.5	35	0.5	10	1.43
CMIBPF-2593	2593	97	194	1.0	10	1.3
LBTX-BPF-41	2593	97	194	0.5	100	1.38
LBTX-BPF-7	2655	35	70	0.7	100	1.38
CMIBF-4525X290-1	4525	145	290	1.9	10	1.25
CMIBF-4990X320-2	4990	160	320	0.45	10	1.25
CMIBF-7144X250-1	7144.5	125	250	1.5	10	1.5
CMIBF-7500X500-1	7500	250	500	1.75	5	1.5
CMIBF-8475X260-1	8475.5	130	260	2	10	1.5
CMIBF-9000X1000-1	9000	500	1000	1	10	1.3
CMIBF-9500X1000-1	9500	500	1000	0.8	300	1.5
9600X400-1	9600	200	400	3	10	1.5
CMIBF-12900X1500	12900	750	1500	2	5	1.5
CMIBF-13000X6000	13000	3000	6000	1	1	1.5
CMIBF-13900X1500	13900	750	1500	2	5	1.5
CMIBF-14900X1500	14900	750	1500	2	5	1.5
CMIBF-15000X6000	15000	3000	6000	3	1	1.92
CMIBF-15800X460-1	15800	230	460	3.5	5	1.5
CMIBF-16100X1500	16100	750	1500	2	5	1.5
CMIBF-18000X4300	18000	2150	4300	3	1	1.92
CMIBF-L7-1	707	9	18	2.9	50	1.3
CMIBF-S8-1	707	9	18	2.9	50	1.3
CMIBF-708X763-1	708	5	10	1.5	100	1.29
CMIBF-CDMA-1	830	5	10	1	200	1.2

Multi-Band Cavity Filters

Part Number*	Center Frequency (MHz)	Bandwidth (MHz) Fc +/-	Bandwidth (MHz)	Band 2 Center Frequency (MHz)	Bandwidth (MHZ) FC+/-	Bandwidth (MHz)	Insertion Loss (dB) MAX	Power Rating (W)	VSWR (MAX)
CMIBF-L7-1	707	9	18	737	9	18	2.9	50	1.3
CMIBF-S8-1	707	9	18	737	9	18	2.9	50	1.3
CMIBF-708X763-1	708	5	10	763	5	10	1.5	100	1.29
CMIBF-CDMA-1	830	5	10	875	5	10	1	200	1.2

*Click the product name to view the datasheet

Strip line Filters

These ceramic based and high frequency RF filters are extremely robust and light-weight which make them a perfect solution for airborne applications. Strip line filters are available in the frequency range from DC to 40 GHz with power handling to 15 watts. They can be packaged as Surface Mountable (SMT), Drop-In or connectorised in housings either hermetically or non-hermetically sealed.

Wide frequency range
High Reliability High “Q”
Low Loss
High Rejection

Understanding Different Types of Filter

Part Number*	Passband (GHz)	Rejection (dB @ GHz)	Power (W)	VSWR
CMIF0020A-LS	DC-2	>50dB @ 2.5-13	10	<1.3:1
CMIF0060-LS	DC-5.4	>45dB @6.9-14	15	<1.5:1
CMIF00110-LS	DC-9.9	>45dB @12.5-17.5	15	<2.0:1
CMIF3882-BS	3.8-8.2	>30dB @ 3.3 >30dB @ 9	5	<2.0:1
CMIF15130-HS	1.5-13	>50dB @ DC-1	10	2.0:1
CMIF20180-HS	43132	>50dB @ DC-1.5	10	<2.0:1
CMIF30130-HS	41334	>60dB @ DC-2.5	10	<2.0:1
CMIBPF-23G-2G	22-24	>50dB @ 15.5 >30dB @ 27	10	<1.5:1

*Click the product name to view the datasheet

LC (Lumped Element) Filters

LC or Lumped Element filters provide the desired frequency response using inductors (L`s) and capacitors (C`s). LC filters are perhaps the most familiar filter type to most engineers. They are small and low cost but low power handling and higher insertion loss compared to cavity filters.

Understanding Different Types of Filter

Part Number*	Center Frequency (MHz)	Bandwidth (MHz) Fc +/-	Bandwidth (MHz)	Insertion Loss (dB) MAX	Power Rating (W)	VSWR (MAX)
CMIBPF-152-20M	154	10	20	2	1	1.43
CMIBPF-158-6M	158	3	6	3	1	1.43
CMIDBPF-703-748M	725.5	22.5	45	5	1	1.5
CMIDBPF-758-803M	780.5	22.5	45	3	1	1.5
CMIDBPF-791-821M	806	15	30	3	1	1.5
CMIDBPF-814-849M	831.5	17.5	35	5	1	1.5
CMIBPF-0.825-0.86G	842.5	17.5	35	3	1	1.5
CMIDBPF-832-862M	847	15	30	5	1	1.5
CMIDBPF-859-894M	876.5	17.5	35	3	1	1.5
CMIDBPF-880-915M	897.5	17.5	35	4	1	1.5
CMIBPF-925-960M	942.5	17.5	35	3	1	1.5
CMIBPF-1650	1650	250	500	3	1	1.8
CMIDBPF 1.71-1.785	1747.5	37.5	75	5	1	1.5
CMIDBPF-1710-1780	1747.5	35	70	5	1	1.5
CMIBPF-1800	1800	50	100	6	1	1.5
CMIBPF-1.8-1.88G	1842.5	37.5	75	3	1	1.5
CMIBPF-1850	1850	50	100	6	1	1.5
CMIDBPF-1850-1915	1882.5	32.5	65	5	1	1.5
CMIBPF-1900	1900	500	1000	2	1	1.5
CMIDBPF-1930-1995	1962.5	32.5	65	3	1	1.5
CMIDBPF 1.92-2.01G	1965	45	90	3	1	1.5
CMIBPF-2.11-2.2G	2155	45	90	3	1	1.5
CMIDBPF-2110-2200	2155	45	90	3	1	1.5
CMIDBPF-2300-2400	2350	50	100	5	1	1.5
CMIDBPF-2.5-2.57G	2535	35	70	4	1	1.5
CMIBPF-2.62-2.69G	2655	35	70	3	1	1.5
CMIBPF-19G-25M	19171.5	12.5	25	2.5	1	1.5
CMIBPF-29G-45M	29218.5	22.5	45	2.5	1	1.5

*Click the product name to view the datasheet

Diplexers and Multiplexers

By using different filter types, designs can be optimised to each customer’s multiplexing requirements.

Combining RF Signals

Part Number*	Frequency (MHz)	Designed for Systems	Insertion Loss (dB Max)	Insertion Loss (dB Typ)	Passband Ripple (dB Max, p-p)	Return Loss (dB)	Stopband Attenuation (dB)
CMIF228-CDMA&GSM-02	825- 880 909 – 960	CDMA/GSM	0.8	0.5	0.5	14	70 Relative 65 Relative
CMIF228-CDMA&GSM-05	825 – 835 870 – 880 909 – 915 954 – 960	CDMA/GSM	1.8	1.6	0.5	18	80 (CDMA Up to Down) 90 (GSM Up to Down)
CMIF228-CDMA&GSM-07	825 – 880 909 – 960	CDMA/GSM	0.8	0.5	0.5	18	88 Relative 88 Relative
CMIF228-GSM-01	909 – 915 954 – 960	GSM	1	0.6	0.5	18	90 @ Channel
CMIF228-GSM-04	890 – 915 835 – 960	GSM	1.8	1.5	0.5	18	70 @ Channel
CMIF228 – CDMA-07	825 – 835 870 – 880	CDMA	1.5	1.2	0.5	18	8 (+/- 7.5 MHz) 90 @ Channel
CMIF228-CDMA-06	1920 – 1980	CDMA	1	0.8	0.5	18	45 (1900 – 2000 MHz) 90 (2110 – 2170 MHz)
CMIF228-WLAN&PHS-01	1885 – 1920 2400 – 2483	WLAN/PHS	1	0.6	0.6	18	75 @ Channel
CMIF228-WCDMA-01	1920 – 1980 2110 – 2170	WCDMA	1	0.8	0.5	18	45 (1900 /2000 MHz) 45 (2190/2090 MHz) 90 @ Channel

*Click the product name to view the datasheet

Hybrid Diplexers

These hybrid diplexers are unique because they use the entire frequency band by either notching or passing the frequencies. They are also great for testing the quality of an amplifier or chip set by seeing in band and out of band signals. They have an ultra low noise floor and allow for the ability to search for harmonics.

Part number*	Input Freq. Range (GHz)	Freq. Range (MHz)	Band Pass Insertion Loss	Band Reject Insertion Loss	Band Pass Rejection	Band Reject Rejection
CMIBFNF-4400-5000	2 - 8	4400 - 5000	2.5 dB Max	2 dB @ 2000 - 3900 MHz 4 dB @ 5500 - 8000 MHz	55 dB	40 dB Min
CMIBFNF-5.0-6.0G	2 - 8	5000 - 6000	3 dB Max	3 dB @ 2000 - 4100 MHz 4 db @ 7200 - 8000 MHz	55 dB	40 dB Min
CMIBFNF-3.3-4.2G	2 - 8	3300 - 4200	2.5 dB Max	2 dB @ 2000 - 3100 MHz 4 dB @ 4500 - 8000 MHz	55 dB	40 dB Min
CMIBFNF-2496-2690	2 - 8	2496 - 2690	2.5 dB Max	2 dB @ 2000 - 2350 MHz 4 dB @ 2840 - 8000 MHz	55 dB	40 dB Min

*Click the product name to view the datasheet

Broadband Diplexers

The CMIDX series of high-power broadband diplexers are capable of handling input power of up to 150 watts, ideal for signal combining applications such as:

jamming
communication systems
re-broadcasting signals
multiband antenna systems with a common seeder.

The passbands, temperature range and input power can be customised for each application. The diplexers are compact in size and offer constant VSRW through the band and the cross over region, as well as temperature stability across the frequency band.

The broadband diplexers feature:

An impedance of 50 Ω
A customisable passband frequency range of 2-6 GHz or 8-18 GHz
N-Female connectors
A rejection band attenuation of 40 dB MIN.

CMIDX Series Datasheet

Cavity Triplexers

Cavity Triplexers are bi-directional devices consisting of 3 bandpass filters (L-Band, S-Band and C-Band) and are designed with a bulkhead “N” connector for easy mounting to a bulkhead. They are very compact in size and offer extremely high channel to channel isolation greater than 90 dB. The triplexers allow all filters to be combined into one common port.

	Datasheet	Download
	Product	CMIMUX3-90DB-03A
	Description	Cavity Triplexer
	Bands	L-Band: 1350~1390 MHz S-Band: 2200~2400 MHz C-Band: 4400~5000 MHz

In-line RF Breakout Adaptors

In-line RF breakout adaptors are designed to be placed between a piece of equipment and an antenna, allowing filters to be hot swapped without dismantling the equipment being used. They offer a convenient way to connect RF filters into existing antenna systems using either N-type or RAIN style connections. Filters are connected to the adaptor using the two connectors on the side, allowing for minimum disruption of the antenna assembly’s overall dimensions.

Parameter	N-type to N-type (76936)	RAIN to RAIN (76937)
Number of RF Channels	1	1
IP Rating	IP65	IP65
External Dimensions	95 mm x 28 mm x 53 mm	120 mm x 28 mm x 53 mm
Weight	220 g	290 g
Material	Aluminium 7075 (Surtec 650 finish)	Aluminium 7075 (Surtec 650 finish)
RF Input / Output Connectors	1 x N-type (male), 3 x N-type (female)	2 x N-type (female), 1 x RAIN TCF (female), 1 x RAIN TCF (male)
Operating Temperature	-30˚C to +90˚C	-30˚C to +90˚C
Storage Temperature	-30˚C to +90˚C	-30˚C to +90˚C
Total Insertion Loss*	0.6 dB max.	1.2 dB max.
Input Frequency	DC to 6 GHz	DC to 6 GHz
Path to Path Isolation	>70 dB	>70 dB

*Cumulative loss of both the input and output sides of the adaptor.

Please contact us to find out more about this product.

Switch Filter Bank

Switch Filter Banks offer low insertion loss and fast switching speeds. There are a variety of filter types available including strip line, LC, cavity and much more.

Passband Frequency of 10 MHz to 40 GHz
Up to 10 channels
Low insertion loss of less than 5 dB (typical)
Fast switching speeds of 100 ns
Adjustable mechanical form factor to drop-in custom space
Rejection of 60 dB min
Power supply +5VDC typical
Optional low noise amplification

	Datasheet	Download
	Product	CMIINV-5BT2-RM
	Description	Multi Switch Bank Filter for US LTE and GSM bands
	Bands	LTE2100 PCS-1900 GSM 850 Upper 700 MHz Lower 700 MHz

	Datasheet	Download
	Product	CMIINV-5BLTE-RM
	Description	Multi Band Cellular Switch Bank Filter
	Bands	Band 1 Band 3 Band 7 Band 8 Band 20

	Datasheet	Download
	Product	CMISFB-80180T4
	Description	Multi Switch Bank Filter
	Bands	8 - 10 GHz 10 - 12 GHz 12 - 15 GHz 15 - 18 GHz

More Information?

Telephone +44 (0) 1793 784389 or email: sales@ppmsystems.com

RF Filters and Signal Conditioning

RF Filters

Custom RF Filters

Plastic Filters

Cavity Filters

Cavity Filters

Multi-Band Cavity Filters

Strip line Filters

LC (Lumped Element) Filters

Diplexers and Multiplexers

Hybrid Diplexers

Broadband Diplexers

Cavity Triplexers

In-line RF Breakout Adaptors

Switch Filter Bank

More Information?

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